Feng Office: Externally Controlled Reference to a Resource in Another Sphere
CVE-2025-5877 is a high-severity externally controlled reference to a resource in another sphere vulnerability in Feng Office from Fengoffice, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected Feng Office versions: 3.2.2.1. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.46% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Feng Office you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Fengoffice | Feng Office | 3.2.2.1 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 2.1 | Low | CNA (vuldb.com) |
| CVSS 3.1 | 6.3 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 8.1 | High | NVD |
| CVSS 2.0 | 6.5 | Medium | CNA (vuldb.com) |
Official description
A vulnerability, which was classified as problematic, has been found in Fengoffice Feng Office 3.2.2.1. Affected by this issue is some unknown functionality of the file /application/models/ApplicationDataObject.class.php of the component Document Upload Handler. The manipulation leads to xml external entity reference. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Externally Controlled Reference to a Resource in Another Sphere
The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.
More Externally Controlled Reference to a Resource in Another Sphere vulnerabilities (CWE-610)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/?ctiid.311636Permissions Required, Third Party Advisory, VDB Entry
- vuldb.com/?id.311636Third Party Advisory, VDB Entry
- vuldb.com/?submit.586971Third Party Advisory, VDB Entry
Technical write-ups (may include proof of concept)
- gist.github.com/mcdruid/e78694d754f44884830898be082fcbaaExploit, Third Party Advisory
- gist.github.com/mcdruid/e78694d754f44884830898be082fcbaa#steps-to-reproduceExploit, Third Party Advisory
Other vulnerabilities in Feng Office
- 7.3 High severity
Recent Externally Controlled Reference to a Resource in Another Sphere vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 6.5 Medium severity
Palo Alto Networks PAN-OS File Read Exploited
- 8.8 High severity
- 9.1 Critical severity
- 8.2 High severity
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